tty: Replace ASYNC_CHECK_CD and update atomically
Replace ASYNC_CHECK_CD bit in the tty_port::flags field with
TTY_PORT_CHECK_CD bit in the tty_port::iflags field. Introduce helpers
tty_port_set_check_carrier() and tty_port_check_carrier() to abstract
the atomic bit ops.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c
index b55f846..b67b54a 100644
--- a/drivers/tty/synclink.c
+++ b/drivers/tty/synclink.c
@@ -1340,7 +1340,7 @@
wake_up_interruptible(&info->status_event_wait_q);
wake_up_interruptible(&info->event_wait_q);
- if ( (info->port.flags & ASYNC_CHECK_CD) &&
+ if (tty_port_check_carrier(&info->port) &&
(status & MISCSTATUS_DCD_LATCHED) ) {
if ( debug_level >= DEBUG_LEVEL_ISR )
printk("%s CD now %s...", info->device_name,
@@ -1967,11 +1967,7 @@
info->timeout += HZ/50; /* Add .02 seconds of slop */
tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
-
- if (cflag & CLOCAL)
- info->port.flags &= ~ASYNC_CHECK_CD;
- else
- info->port.flags |= ASYNC_CHECK_CD;
+ tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
/* process tty input control flags */